EP2069736A1 - Verfahren zum passiven bestimmen der betriebstemperatur in einer thermisch stark belasteten einrichtung sowie vorrichtung zur durchführung des verfahrens - Google Patents
Verfahren zum passiven bestimmen der betriebstemperatur in einer thermisch stark belasteten einrichtung sowie vorrichtung zur durchführung des verfahrensInfo
- Publication number
- EP2069736A1 EP2069736A1 EP07803146A EP07803146A EP2069736A1 EP 2069736 A1 EP2069736 A1 EP 2069736A1 EP 07803146 A EP07803146 A EP 07803146A EP 07803146 A EP07803146 A EP 07803146A EP 2069736 A1 EP2069736 A1 EP 2069736A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- physical parameter
- measuring elements
- measuring
- measurement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K3/00—Thermometers giving results other than momentary value of temperature
- G01K3/005—Circuits arrangements for indicating a predetermined temperature
Definitions
- the present invention relates to the field of temperature measurement. It relates to a method for passively determining the operating temperature in a thermally heavily loaded device and to an apparatus for carrying out the method.
- Such an ideally reversible process results in a measurable change in physical properties (magnitudes, parameters) that can be electrical (more specific Resistance), or magnetic (permeability, magnetization, magnetic saturation), or mechanical (hardness, elastic modulus, transverse strain, yield point, strain, density), or acoustic (compression wave velocity, shear wave velocity, rod velocity), or thermal (thermal conductivity and expansion), or optically (color change).
- physical properties magnitudes, parameters
- magnitudes, parameters can be electrical (more specific Resistance), or magnetic (permeability, magnetization, magnetic saturation), or mechanical (hardness, elastic modulus, transverse strain, yield point, strain, density), or acoustic (compression wave velocity, shear wave velocity, rod velocity), or thermal (thermal conductivity and expansion), or optically (color change).
- the attempt is made to determine the last high-temperature operation by subjecting the parts under investigation to different heat treatments and to find the desired temperature using empirical interpolation rules.
- the object is solved by the entirety of the features of claim 1.
- the solution according to the invention proposes exposing a set of thermo-memory elements to the high temperatures to be determined, each element of the set having been previously subjected to a heat treatment at a well-defined, element-to-element temperature.
- the element whose heat treatment temperature is closest to the operating temperature shows the least changes in its physical properties.
- the resolution is a function of the accuracy with which the heat treatment has previously been applied to the elements.
- An embodiment of the method according to the invention is characterized in that the measured values of the physical parameter are subtracted from one another in pairs as part of the comparison of the values from the first and second measurements.
- other mathematical approaches can be used to compare the two measurements.
- Another embodiment of the invention is characterized in that for adjusting the different physical parameter in the measuring elements, the measuring elements are each subjected to a heat treatment with different temperature, the different temperatures of the heat treatment are in a predetermined temperature range and are evenly distributed over the predetermined temperature range.
- An embodiment of the device according to the invention is characterized in that the measuring elements are solid bodies with a volume of a few mm 3 .
- Fig. 1 shows an exemplary dependence of a physical parameter
- 2 shows an exemplary 1-, 2- or 3-dimensional arrangement of individual elements with temperature memory for measuring the temperature.
- 3 shows the first measurement of the physical parameter P of the individual
- Fig. 5 shows the use of the element arrangement in a thermal machine, e.g. a gas turbine
- FIG. 6 shows the second measurement of the physical parameter P of the individual elements in the arrangement according to FIG. 2 according to FIG.
- FIG. 7 shows the values of the physical parameter determined for the measurement according to FIG. 6 for the individual elements of FIG.
- the invention is based on, for example, a cuboid measuring element Ex with the edge lengths 2x2x1 mm, which consists of a material having a physical parameter P, eg the electrical conductivity, according to the curve shown in FIG depends on the temperature T H ⁇ , at which the
- Measuring element Ex has been subjected to a prolonged heat treatment (Heat Treatment HT).
- Heat Treatment HT Heat Treatment
- Other physical parameters mechanical, magnetic, optical or thermal type are of course also conceivable.
- the value of the physical parameter P achieved in this heat treatment is maintained if, after the heat treatment, the measuring element Ex is cooled sufficiently quickly to normal temperature.
- En can at various measuring elements E1, .., by choosing different temperatures Ti, .., T n of the heat treatment in a clear and reversible manner in accordance with different values Pi, .., P n of the physical parameter P generated. Then, for example, the measuring element E3, the physical parameter P by a heat treatment in the
- Heat treatment temperature T H ⁇ T 3 has been set to a value P 3 , then subjected to a heat treatment at the lower temperature T 2 , the value of the physical parameter P of P 3 to P 2 changes .
- the current operating temperature at a part of the device is to be measured, a plurality of individual measuring elements E1, .. , En, which have been heat-treated at different graded temperatures Ti, .., T n , and correspondingly have different values Pi,..., P n of the selected physical parameter P.
- the temperature values Ti, .., T n should be distributed as evenly as possible over the expected operating temperature.
- FIG. 2 shows a linear arrangement of the measuring elements E1,. a 2-dimensional arrangement is indicated by the dotted subscribed additional elements).
- the element arrangement 10 it should be ensured that the individual measuring elements contained therein E1, .., En are exposed at the later measuring location during the measurement as far as possible all the same operating temperature in order to enable a clear temperature determination.
- the value of the physical parameter P for each of the measuring elements E1,... En is determined in a first measurement by means of a suitable measuring device 11, as shown in FIG.
- a linear arrangement of measuring elements E1, .., En a linear series of associated P values Pi, P 2 , P 3 ,..., P n -2, P n -i, P results according to FIG n ;
- a 2-dimensional arrangement of measuring elements Ex a 2-dimensional matrix of P-values would accordingly be obtained.
- the element arrangement 10 according to FIG. 5 can be attached to a machine part 12 or the like at the location selected for the temperature measurement, and is exposed there to an operating temperature T M during the duration of the measurement.
- the heat treatment temperature T H ⁇ equal to the operating temperature T M , or only slightly deviates from this, the value of the physical parameter P does not change or only slightly.
- the comparison can be formalized by subtracting the rows or matrices of the measured P values before and after use, as shown schematically in FIG.
- the measuring element E1 results from the subtraction Pi-P'i a difference value xi
- the measuring element E2 results from the subtraction P 2 -P ' 2 a difference value X 2 , etc .. If, for example, it turns out that the measured value P ' n-2 is approximately equal to the measured value P n-2 , the subtraction gives approximately the difference value 0 ( Figure 8). It can then be concluded that the operating temperature T M to be measured was approximately equal to the heat treatment temperature T n-2 of the measuring element E n-2 .
- the measuring method according to the invention can be summarized once again as follows:
- the elements are preset by a heat treatment, each element being subjected to a different heat treatment temperature.
- the preset elements are arranged in a suitable arrangement (1 -, 2 - or 3-dimensional).
- the element arrangement is installed at the measuring location and exposed to the operating temperature there. (6) Upon completion of the operation, the assembly is removed and the selected physical properties of the elements are measured again.
- the measured values are compared in pairs, e.g. subtracted from each other. In the case of a subtraction, that has one
- the proposed new measurement method is a relative and not an absolute measurement. It allows a precise and cost-effective measurement of the thermal operating conditions in gas turbines and boilers. Depending on the material of the elements used, different temperature ranges can be covered, so that the method is applicable to thermal devices with different operating temperatures.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH15652006 | 2006-10-02 | ||
| PCT/EP2007/059159 WO2008040603A1 (de) | 2006-10-02 | 2007-09-03 | Verfahren zum passiven bestimmen der betriebstemperatur in einer thermisch stark belasteten einrichtung sowie vorrichtung zur durchführung des verfahrens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2069736A1 true EP2069736A1 (de) | 2009-06-17 |
| EP2069736B1 EP2069736B1 (de) | 2011-10-26 |
Family
ID=37835270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07803146A Not-in-force EP2069736B1 (de) | 2006-10-02 | 2007-09-03 | Verfahren zum passiven bestimmen der betriebstemperatur in einer thermisch stark belasteten einrichtung sowie vorrichtung zur durchführung des verfahrens |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8342745B2 (de) |
| EP (1) | EP2069736B1 (de) |
| AT (1) | ATE530884T1 (de) |
| CA (1) | CA2663740C (de) |
| WO (1) | WO2008040603A1 (de) |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2614430A (en) * | 1950-02-01 | 1952-10-21 | Eastman Kodak Co | Temperature indicating device |
| US3175401A (en) * | 1962-04-12 | 1965-03-30 | Donald E Geldmacher | Body temperature indicator |
| US3430491A (en) * | 1966-12-27 | 1969-03-04 | Leigh R Gignilliat | Disposable clinical thermometer |
| US3631720A (en) * | 1969-10-22 | 1972-01-04 | Bio Medical Sciences Inc | Disposable thermometer |
| US4248089A (en) * | 1975-09-08 | 1981-02-03 | Ferdinand Heinmets | Temperature measuring |
| US3998098A (en) * | 1975-09-22 | 1976-12-21 | George Chilton | Disposable thermometer |
| US4232552A (en) * | 1978-09-28 | 1980-11-11 | Akzona Incorporated | Temperature indicating compositions of matter |
| US4650707A (en) * | 1985-05-28 | 1987-03-17 | Thermotech D.L.C., Inc. | Temperature indication means for fire fighters |
| US4779995A (en) * | 1986-09-04 | 1988-10-25 | American Thermometer Co., Inc. | Reusable liquid crystal thermometer |
| JPH0771726B2 (ja) * | 1987-11-30 | 1995-08-02 | 川崎製鉄株式会社 | 連続鋳造方法 |
| US5094545A (en) * | 1990-09-28 | 1992-03-10 | Pyma Corporation | Urine temperature measuring device |
| JP2001305084A (ja) * | 2000-04-19 | 2001-10-31 | Eiji Nemoto | レーザパルス点熱源加熱法を用いた三次元異方性物質の主軸熱拡散率および主軸角の同時測定法および装置 |
| US20050198967A1 (en) * | 2002-09-23 | 2005-09-15 | Siemens Westinghouse Power Corp. | Smart component for use in an operating environment |
| US7582359B2 (en) * | 2002-09-23 | 2009-09-01 | Siemens Energy, Inc. | Apparatus and method of monitoring operating parameters of a gas turbine |
| EP1473517A1 (de) * | 2003-04-30 | 2004-11-03 | Siemens Aktiengesellschaft | Brennkammer |
| US7258073B2 (en) * | 2004-01-20 | 2007-08-21 | Mcguire Katherine M | Pictorial thermometer |
| US6974249B1 (en) * | 2004-03-17 | 2005-12-13 | The United States Of America As Represented By The Secretary Of The Air Force | Thermal history sensor |
| WO2007056752A2 (en) * | 2005-11-08 | 2007-05-18 | Temptime Corporation | Combination freeze indicators |
| US8177423B1 (en) * | 2007-05-18 | 2012-05-15 | The United States Of America As Represented By The Secretary Of The Air Force | Thermal history sensor utilizing electrical conductivity and magnetic permeability |
| US8136988B2 (en) * | 2009-01-15 | 2012-03-20 | The Boeing Company | Methods and systems for passive, wireless temperature monitoring |
| US20100290503A1 (en) * | 2009-05-13 | 2010-11-18 | Prime Photonics, Lc | Ultra-High Temperature Distributed Wireless Sensors |
| US20120027045A1 (en) * | 2010-02-01 | 2012-02-02 | Nano Terra Inc. | Passive thermal monitoring systems and methods of making and using the same |
-
2007
- 2007-09-03 CA CA2663740A patent/CA2663740C/en not_active Expired - Fee Related
- 2007-09-03 EP EP07803146A patent/EP2069736B1/de not_active Not-in-force
- 2007-09-03 AT AT07803146T patent/ATE530884T1/de active
- 2007-09-03 WO PCT/EP2007/059159 patent/WO2008040603A1/de not_active Ceased
-
2009
- 2009-03-13 US US12/403,918 patent/US8342745B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008040603A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008040603A1 (de) | 2008-04-10 |
| US8342745B2 (en) | 2013-01-01 |
| ATE530884T1 (de) | 2011-11-15 |
| CA2663740C (en) | 2015-11-03 |
| CA2663740A1 (en) | 2008-04-10 |
| US20090252194A1 (en) | 2009-10-08 |
| EP2069736B1 (de) | 2011-10-26 |
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